| NEWTONSTHIRDLAW | "For every action, there is an equal and opposite reaction" |
| EQUAL | "To every action there is always opposed an - reaction", according to Newton's third law of motion (5) |
| PEER | A person who is an equal in social standing, rank or age (4) |
| REACTION | According to Newton, every action in nature has an equal and opposite ... |
| FARAD | The capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and |
| POSITRONS | In physics, the antiparticles of electrons, having the same mass but an equal and opposite charge (9) |
| SEEDCASE | Issue requiring action - there are plant ovules in it |
| GATHEREDTOAHEAD | Got ready for action: there's a fly about, a male, eaten by an amphibian (8,2,1,4) |
| NOTECASE | School backed legal action - there's usually money in it (8) |
| PLEA | Initially petitioners learn every action to appeal (4) |
| COUNTERBALANCES | Offsets; applies and equal and opposite force (15) |
| DIPOLE | What is a pair of equal and opposite electric charges (6) |
| POLAR | Having a pair of equal and opposite charges. |
| REACTIONS | Forces which are defined as 'equal and opposite' according to Newton's Third Law (9) |
| POSITRON | An elementary particle with the same mass as an electron but an equal and positive charge (8) |
| DISAPPEAR | Audibly bad-mouth an equal - and take flight |
| RHOMBUS | Quadrilateral with opposite sides parallel and opposite angles equal (7) |
| COTANGENTREASON | Basis for using the ratio of adjacent and opposite sides of a triangle, relative to an angle? |
| EVERY | For ___ complex problem there is an answer that is clear, simple, and wrong, per H.L.Mencken |
| UNKNOWABLE | 'Where there is an ___, there is a promise', quote by Thornton Wilder (10) |
